The Journal of the Korea institute of electronic communication sciences (한국전자통신학회논문지)

Korea Institute of Electronic Communication Science (한국전자통신학회)
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Removal of Radio Frequency Interference of 1.29 GHz Doppler Wind Profiler Radar

1.29 GHz 도플러 윈드프로파일러 스펙트럼에서 전파 간섭 신호 제거

  • 이경훈 (부경대학교 지구환경시스템과학부) ;
  • 권병혁 (부경대학교 환경대기과학과) ;
  • 김유진 (부경대학교 지구환경시스템과학부)
  • Received : 2022.04.02
  • Accepted : 2022.06.17
  • Published : 2022.06.30
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Abstract

During the test operation period of the wind profiler prototype, radio frequency interference (RFI) contamination occurred in the spectrum. The reference of the RFI that removed the algorithm appearing in the wind profiler spectrum were investigated, and a new algorithm was developed to remove the RFI. First, it was filtered with a threshold value of 0.1 m/s of the spectral width, and the range of the number of gates with the same radial velocity was determined according to whether the beam was a vertical beam or an oblique beam. RFI contamination was removed through filtering and scanning of non-weather signals, and the continuity of wind vectors calculated from the improved spectral radial velocity was verified.

윈드프로파일러 시제품의 시험 운용 기간 중 스펙트럼에 전파 간섭(RFI: Radio Frequency Interference) 오염이 발생하였다. 윈드프로파일러 spectra에 나타나는 전파 간섭 제거 알고리즘의 개발 과정과 그 결과를 조사하였고, 전파 간섭을 제거하기 위한 새로운 알고리즘을 개발하였다. 스펙트럼 폭의 임계값 0.1 m/s로 우선 필터링하고 연직 빔인지 경사 빔인지에 따라 동일한 시선속도가 연속되는 gate 수 범위를 결정하였다. 전파 간섭 오염은 비기상 신호의 필터링과 스캔을 통해 제거되었고, 개선된 스펙트럼의 시선속도로부터 산출된 바람벡터의 연속성으로 검증되었다.

Keywords

Acknowledgement

이 연구는 기상청 기상레이더센터 R&D "국가 레이더 통합 활용기술 개발 사업"의 "레이더 기반 위험기상 감시기술 개발(KMA2021-03121)" 지원으로 수행되었습니다.

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